Centrifugal pump



July26,1960 v R LOVE 946,289

CENTRIFUGAL PUMP Filed April 14. 1958 2 Sheets-Sheet 1 ZAFR a T i i J INVENTOR.

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2 Sheets-Sheet 2 Filed April 14. 1958 mvsmon. PORTER G. LOVE 0 X r11? U d tate Pat nt 073c 2,946,289 CENTRIFUGAL rUM'P Porter G.Love, Box' 292, Colo. Filed Apr. 14, 1958, Ser. No. 728,402; v

" 2 Claims. (01. 163-160) This invention relates to pumps and more particularly to a centrifugal type vacuum pump.

It is an object of the present invention to provide a vacuum type lift pump for raising water from a lower to a higher level in a very simple. and eflicient manner.

Another object of the present invention is to provide a centrifugal type vacuum pump which relies upon the action of centrifugal force to create a partial vacuum for drawing water upwardly through a delivery conduit and out through a plurality of eduction-pipes.

Still another object of the present invention is to provide a vacuum pump of the above type that has self contained means for priming the unit and which can accumulate a substantially large quantity of water during the continued operation of the pump.

Other objects of the invention are to provide a centrifugal type vacuum pump bearing the above objects in mind which is of simple construction, has a minimum number of parts, is inexpensive to manufacture and eficient in operation.

For other objects and for a better understanding of the invention, reference may be had to the following detailed description taken in conjunction with the accompanying drawing, in which:

Figure 1 is a side elevational view, with parts broken away, of a centrifugal type vacuum pump made in accordance with the present invention in operative use; and

Figure 2 is a fragmentary top plan view of the apparatus shown in Figure 1.

Referring now more in detail to the drawing, a vacuum pump madein accordance with the present invention is shown to include a rigid support frame '12 having a plurality of vertically spaced apart and axially aligned roller bearings 14 for rotatably supporting a vertical hollow column 15 for rotation about a vertical axis.

The vertical column 15 is provided with a central longitudinal bore 16 that is operative to deliver water from the lower end to the upper end thereof. The upper extremity of the shaft or column 15 is provided with anintegral tubular cross head 18 which has an integral rai dially outwardly extending tubular eduction arm 19 at diametrically opposite sides of the column 15. The tubular eduction arms 19 provide a pair of inwardly opening U-shaped eduction tubes with a horizontal inlet portion and an outer free end portion, the outer free end portion of each such arm 19 is curved upwardly and horizontally inwardly in the form of spout 21, spaced above and parallel with the inlet portion of the arm. The spouts 21, or discharge extremities which project in opposite directions and toward each other serve to reverse the direction of fluid flow as it is directed radially outwardly through the arms 19, in a manner to prevent the direct flow of water from striking the outer wall of the tank 27, hereinafter more fully described. The arms are therefore provided with 180 degree bends at the outer ends thereof whereby the free ends, or nozzles, project toward each other causing the air to pass by the open ends at 90 degrees thereto,

Zfiifiidh Patented July 26, .1960

the rotationof said'arms with said 180 degree bends causing an area of reduced pressure above said crosshead. V I

'- 'l'he' lower end" of the column 15 is constructed in the tute an inwardly opening check valve assembly which will enable water to pass freely upwardly into the column but which will retain any water contained within the column and prevent it from flowing outwardly of the pump, thus constituting means for priming the pump at all times.

Accumulating means in the form of 'a tank 27 completely surrounds the upper portion of the column 15 and the arms 19 of the pump. A sleeve 28 provides a water tight seal between these parts which permits the column to rotate relative to the tank. A discharge spout 29 at one side of the tank provides means for withdrawing the water as it is accumulated.

In actual use, a pulley 31 is fixed to any convenient location on the column 15, and a belt 32 is placed in driving relationship therewith. With the lower end of the column immersed in a supply of water, and by effecting rotation of the column by means of the belt 32, the water contained within the column 15 and cross arms 19 that was placed therein as a primer, will be thrown outwardly through the discharge spouts 21 under the action of centrifugal force, the two streams therefrom meeting at the center of said tank 27 preventing direct contact with the tank walls and causing undesirable turbulences therein. This outward flow of the water thus produces a partial vacuum or a lower pressure within the cross head 18 that has the effect of drawing still additional water upwardly through the column 15 from the source at the lower end thereof. Of course, the rate at which the water is drawn upwardly through the column into the accumulating tank 217 and the height to which such water can be raised will depend upon the degree of centrifugal force developed and caused by the speed of rotation of the column through the pulley 31.

While various changes may be made in the detail construction, it shall be understood that such changes shall be within the spirit and scope of the present invention as defined by the appended claims.

What I claim as new and desire to protect by Letters Patent of the United States is:

1. A centrifugal type vacuum pump of the class described, in combination, a central hollow shaft forming a water conduit communicating with the source of water supply, a valve chamber integrally formed with the bottom of said hollow shaft and carried thereby, the upper wall of said chamber having a restricted opening communicating with the lower end of said hollow shaft, the lower wall of said chamber having a restricted opening forming a downwardly facing seat, a ball member disposed within said chamber to seat. upon said downwardly facing seat, a tubular cross-head integrally secured upon the upper end of said hollow shaft, a pair of integral branch eduction arms having the inlet ends thereof extending laterally from opposite sides of said cross-head in a common horizontal plane, the outer end portions of said eduction arms curved, upwardly, inwardly, parallel and spaced above the said inlet end portions thereby forming 180 degree bends and free ends, said free ends thereof forming open non-restricted nozzles in a common horizontal plane for the escape of water therefrom, air passes said free ends at degrees when said arms are rotated, both of said nozzles discharging rwater inwardly toward and above said cross-head, said nozzles 'beihg' dis'posed' ving said shaft-and integral parts form dytherewith'.

2. The combination according to claim 1, further-senibodying a stationary tank with la elosed-hottom, substantially closed side walls, and top wall With-r1 neutral opening therein, said tank enclosing said .e ductionfarmsnnd thenpper end portion of said hollow shaft, and suitable sealing means confined .withinsaid tank rend providing :a water tight seal between-said upper ortipnof said shaft and the .baseportion ofsaid tank, and ar diseharge spout rainea'wit-a'me side ofs'aid "tank for withdrawing the water therefrom ,andkeeping the level of the water insaid tank below the common level of said nozzles.

References Cited in the file of this patent UNITED STATES PATENTS 405,294 Baker June 18, 1889' 539,239 Smith May 14, 1895 919,869 Hunne Apr. 27, 1909 941,557 Bnrrell v. 30, 1909 949,21? Biirrell "Fe'b. 15, 1910 967,122 i .j Hal1 -,Aug. 9, 1910 1,185,939 Reed June 6, 19-16 

